title: [New investigations on the sporangial and parasporangial organs in the ferns. I. Paraphyses and sorus in Polypodium nigrescers Bl..].
mesh_terms: D029624:Ferns; D010944:Plants; D032494:Polypodium; D058432:Sporangia
keywords: PLANTS
vernacular_title: Nouvelles recherches sur les organes sporangiaux et parasporangiaux chez les fougères. I. Paraphyses et sore; chez polypodium nigrescens Bl.